What about the time it will take to implement the vaccine production?
But he said the general approach to vaccine production through genomes was valid.
The other manufacturers are not expected to be able to increase supply that much because vaccine production takes time.
To be sure, vaccine production has a checkered legal history.
Some researchers worry that the 60-year-old technology for vaccine production may be too slow to stop a major new yellow fever epidemic.
The time when the three strains are chosen is critical to vaccine production.
You cannot have a vital function like vaccine production limited to the manufacturing capacity of two companies.
Many public health experts said the government had to work with manufacturers to find ways to make vaccine production attractive.
A change in the approach to regulating vaccine production might also have contributed to problems in meeting the standards.
The agency hopes to develop in a month a seed virus for possible vaccine production.